Fuera de Stock Ask us about availability HALCYON Halcyon, H-50D first stage 65.102.150 210.00 € The H-50D is a high performance diaphragm design that is fully sealed and purpose-built for harsh conditions, such as ice or environmentally contaminated environments. Diaphragm first stages are historically popular with cold water divers, and the H-50D was engineered for extreme conditions. Go dive extraordinary places with your H-50D, and be confident... Add to cart